LM5164

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6-V to 100-V input, 1-A synchronous buck DC-DC converter with ultra-low IQ

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Product details

Parameters

Vin (Min) (V) 6 Vin (Max) (V) 100 Vout (Min) (V) 1.2 Vout (Max) (V) 90 Iout (Max) (A) 1 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 75 Switching frequency (Max) (kHz) 1000 Features Enable, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Adjustable Control mode Constant on-time (COT) Duty cycle (Max) (%) 99 Type Converter Operating temperature range (C) -40 to 150 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 open-in-new Find other Buck converters (integrated switch)

Features

  • Designed for reliable and rugged applications
    • Wide input voltage range of 6 V to 100 V
    • Junction temperature range: –40°C to +150°C
    • Fixed 3-ms internal soft-start timer
    • Peak and valley current-limit protection
    • Input UVLO and thermal shutdown protection
  • Suited for scalable Industrial power supplies and battery packs
    • Low minimum on- and off-times of 50 ns
    • Adjustable switching frequency up to 1 MHz
    • Diode emulation for high light-load efficiency
    • 10.5-µA no-load input quiescent current
    • 3-µA shutdown quiescent current
    • Optimized for CISPR 32 EMI standard
  • Integration reduces solution size and cost
    • COT mode control architecture
    • Integrated 0.725-Ω NFET buck switch supports wide duty-cycle range
    • Integrated 0.34-Ω NFET synchronous rectifier eliminates external Schottky diode
    • 1.2-V internal voltage reference
    • No loop compensation components
    • Internal VCC bias regulator and boot diode
    • Open-drain power good indicator
    • 8-Pin SOIC package with PowerPAD™
  • Create a custom design using WEBENCH® power designer

All trademarks are the property of their respective owners.

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Description

The LM5164 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on-time of 50 ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5164 operates during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for wide input supply range industrial and high cell count battery pack applications.

With integrated high-side and low-side power MOSFETs, the LM5164 delivers up to 1-A of output current. A constant on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. Additional features of the LM5164 include ultra-low IQ and diode emulation mode operation for high light-load efficiency, innovative peak and valley overcurrent protection, integrated VCC bias supply and bootstrap diode, precision enable and input UVLO, and thermal shutdown protection with automatic recovery. An open-drain PGOOD indicator provides sequencing, fault reporting, and output voltage monitoring.

The LM5164 is available in a thermally-enhanced, 8-pin SO PowerPAD™ package. Its 1.27-mm pin pitch provides adequate spacing for high-voltage applications.

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Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$75.00
Description
The LM5164-Q1 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM5164-Q1, 300-kHz synchronous step-down converter.  The LM5164-Q1EVM operates at very low quiescent current and delivers exceptional efficiency with minimum number of external components.
Features
  • Inegrated Synchronous Rectification
  • Low Operating Quiescent Current
  • High Efficiency at Light Loads
  • Short Minimum On-time

Design tools & simulation

SIMULATION MODELS Download
SNVMBO8.ZIP (116 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBP2.ZIP (5 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBV5.TSC (629 KB) - TINA-TI Spice Model
CALCULATION TOOLS Download
LM5163 and LM5164 converter quickstart design tool
LM5163-LM5164DESIGN-CALC — Welcome to the LM5163 and LM5164 Quickstart Design Tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck converter based on the LM5163 and LM5164 low IQ synchronous buck DC/DC regulator. As such, the user can expeditiously arrive at an optimized (...)
document-generic User guide
Features
  • Determine buck inductance and input and output capacitances
  • Optimize the design using efficiency and solution size as key performance metrics
  • Select components input UVLO, output voltage setpoint, FB ripple, and switching frequency
  • Inspect converter efficiency, solution size, component power (...)
GERBER FILES Download
SNVC226B.ZIP (1902 KB)

Reference designs

REFERENCE DESIGNS Download
Protected DC-bus input power and control power supply reference design for low-voltage servo drives
TIDA-010070 — This reference design uses an ORing controller, the LM5050-1 to provide protection against reverse polarity and reverse current. In conjunction, the LM5069 hot swap controller is used for overcurrent, over voltage, under voltage protection, and inrush current limitation. The design also features (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
16S-17S Battery pack reference design with low current consumption
TIDA-010074 — This reference design is a low standby and low ship mode current consumption 16S-17S LiFePO4 Li-ion battery pack design for telecom battery backup and emotorcycles. It was implemented for a 2-layer PCB. The 9S-15S AFE bq76940 monitors the lower 15 cells voltage and a two-channel general purpose (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Accurate gauging and 50-μA standby current, 13-S, 48-V li-ion battery pack reference design
TIDA-010030 — This reference design is a low standby and ship mode current consumption and high SOC gauging accuracy 13S, 48-V Li-ion battery pack design. It monitors each cell voltage, pack current and temperature with high accuracy and protects the Li-ion battery pack against overvoltage, undervoltage, over (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

Support & training

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